A communication method based on interweave and orthogonal frequency division multiplexing (ofdm) transform domain belongs to wireless communication, referring to frequency spectrum self adaptation transmitting/receiving technology in cognition wireless technology. It contains Transmission side through spectrum estimation, free frequency spectrum marking, random phase generation, zooming and storing steps to generate primary function c * Akej (2 PI mk/m), k=0, n-1.on the other hand, through data mapping and interleaving, to generate data vector e j (2 PI Sik / m - alpha ry),k 0 n-1,then using primary function and data vector corresponding elements multiplication to obtain signal phasor (c * Ak ej 2 PI mk / m) e - j 2 PI Sik / M_ary, and adopting orthogonal frequency division multiplexing (ofdm) mode transmitting receiving end adopts transmission side negative direction operation, finally to obtain transmitted-data symbolic estimation Si. The present invention adopts Cyclic Code Shift Keying CCSK modulating and transmitting signal with lower peak flat ratio based on OFDM transmission and receiving and compatible with current OFDM technology, adopting OFDM reception mode and variance fourier reverse transformation to realize demodulating, avoiding complicate correlator and avoiding adopting complicate Rake reception mode without setting threshold and raising scouting speed and communication system performance. The present invention also adopts interleaving technology irrealizable in tradition time domain CCSK modulating/demodulating. |